What does LSO in the medium of electric metal seal butterfly valve mean? The test was conducted under atmospheric conditions and dry friction conditions. The test temperature was room temperature, the load was 20N, the sliding speed was 4.6m/s, and the total sliding stroke was 1920m. Before and after the test, put the sample into a beaker containing acetone solution, clean it in an ultrasonic cleaner for 3~5min, and then use a Sartorius BS224S electronic balance with an accuracy of 0.1mg to weigh the mass loss of the sensing pin sample before and after wear; Use AF-LI contact and non-contact surface profiler with accuracy of 2 to measure the width and depth of the pit on the worn surface of the disc sample, and calculate the wear volume loss of the pin and disc. The average friction coefficient at the stable stage is selected as the test result, and the arithmetic mean value of the three test results is taken for all wear quantities. According to ASTM-C633-2001 Standard for Bonding Strength Test of Thermal Sprayed Coatings, WE-50 hydraulic tensile tester is used to measure the bonding strength between the coating and the substrate. The thermal shock test of coating is to put the sample into a box type electric furnace at 800 ℃, keep it for 20 minutes, then take it out, put it into cold water at room temperature and quickly cool it to room temperature. Repeat the cycle for 100 times or until the coating falls off. Observe the change of the coating after each thermal cycle, and record the number of thermal cycles for the first crack and the first falling off.
、 After the maintenance is completed, use some fine materials to check whether the connection of each part is completely tightened. If there is a part that needs to be tightened, stop the pneumatic ball valve operation in time and start the maintenance. However, it should not be too tight, which will also affect the movement between the valve and the bearing later. This is what needs attention in the installation combination. There are also some things to pay attention to when storing. In particular, the current enterprises are all self built factories.
